- Measure tread depth with a quarter rather than a penny. When the top of Washington’s head is exposed, the tread depth is 4/32″ or less and it’s time to start shopping for new tires.
- Use a quality gauge to check tire pressure. For proper results, make sure tires are cold. Look for the recommended air pressure in the vehicle’s owner’s manual the tire information decal located inside the driver’s side door or in the glove compartment. The number molded into the tire sidewall is not recommended for normal operating condition; this specification is for a tire that is carrying its maximum rated payload.
“Worn tires should be replaced immediately because they significantly impact safety,” says Brannon. “Testing has shown that tires with only half of their tread depth can take up 6 feet longer to stop from 40 miles-per-hour on a wet surface, even with the antilock braking system engaged.”